> ## Documentation Index
> Fetch the complete documentation index at: https://openrouter-d02e98a0-mintlify-5b6e02fd.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# ExchangeAuthCodeForAPIKeyCodeChallengeMethod - Python SDK

> ExchangeAuthCodeForAPIKeyCodeChallengeMethod method reference

<Warning>
  The Python SDK and docs are currently in beta.
  Report issues on [GitHub](https://github.com/OpenRouterTeam/python-sdk/issues).
</Warning>

The method used to generate the code challenge

## Values

| Name    | Value |
| ------- | ----- |
| `S256`  | S256  |
| `PLAIN` | plain |